Blake Lively had all eyes on her as she arrived at the Gossip Girl 100th episode party in a see-through gown.

The leggy blonde strutted down the red carpet in a Marchesa sheer silk gown with floral embroidery and long tassels.  

Marchesa tweeted its excitement that the lovely Lively chose its frock for the event: Blake Lively looking phenomenal in a frock from our SS 2012 collection at @gossipgirl 100th episode event last night.

Everyone was talking about Lively's ensemble. The actress showed off her flawless body in all the right places, even giving photogs a sneak peek at her backside, wrote the Huffington Post.

Lively joined fellow Gossip Girl cast mates Leighton Meester, Michelle Trachtenberg, Penn Badgley, Ed Westwick and Chace Crawford at Cipriani Wall Street Sunday night to celebrate the series' milestone.

Meester looked beautiful in a curve-hugging cream mini and the gossip boys looked dapper in smoking jackets and loafers. But it was Lively who stole the show.

Some thought the actress looked like an ethereal beauty; others thought she was more ice skater chic. Either way, she had people talking.

The 100th episode of Gossip Girl is set to be one of the series' best, according to executive producer Joshua Safran.

I think it's our biggest episode since the pilot, said Safran. I feel like if you're a fan of the show and you've been watching from the beginning, you're going to feel rewarded. But I also feel like if you're tuning in after a long time, I think you may feel like you've missed a lot, but we really try to hit on everything that's happened since [early on]. I'm very proud of it.

The 100th episode will not air until Jan. 30, but fans have something else to look forward to -- another season. Rumor had it that Safran was going to ax the show. However, at least one more season has been guaranteed, reports Marie Claire UK.